A t-shirt that shows what AR is...outdoor, human powered, multi-sport racing in any conditions in remote locations.
Typical disciplines include mountain biking, trekking, orienteering, trail running, kayaking, rappelling, riverboarding, etc.
Coed teams navigate from checkpoint to checkpoint using only a map and compass. They can take whatever route they like as there is no set course...over the mountain, around the mountain, through the mountain.
First team to the Finish wins.
A short sprint race is usually 4-6 hours, the typical weekend race is 24-30 hours of non-stop racing and expedition races typically run for 3-7 days...again non-top racing.